The Lee mode code has been promoted for better simulation of the dense plasma focus (DPF) device. At the first step, the calculation of magnetic field and tube inductance was improved to include the geometry of the rods forming the cathode. At the second step, the influences of the number of the cylindrical cathodes have been investigated. Ultimately, for enhancing the current sheath dynamics in the axial acceleration phase, the effects of ferrites located near the cathodes have been studied. Simulations were performed with integrating the modified generating equations. The influences of the ferrite’s susceptibility as well as saturation field on the current waveform, the tube inductance, and the current sheath speed in the DPF axial phase have been investigated. The numerical studies showed that increasing the number of cathodes would decrease the starting time of the pinch phase. The weak ferrites presented some enhancement in the total magnetic field and the axial speed of the current sheath.

中文翻译：

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铁氧体对密集等离子体聚焦装置的影响：使用对 Lee 模型的修改

Lee 模式代码已得到推广，以更好地模拟密集等离子体聚焦 (DPF) 设备。第一步，改进了磁场和管电感的计算，以包括形成阴极的棒的几何形状。第二步，研究了圆柱阴极数量的影响。最后，为了增强轴向加速阶段的电流鞘层动力学，研究了位于阴极附近的铁氧体的影响。通过对修改后的生成方程进行积分来进行模拟。研究了铁氧体磁化率和饱和场对DPF轴向相电流波形、管电感和电流鞘速度的影响。数值研究表明，增加阴极数量会减少夹点阶段的开始时间。弱铁氧体在总磁场和电流鞘的轴向速度方面表现出一些增强。